Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 279
th either asphalt, tar,or some other preparation, and in some cases is covered with finegravel. Non=Condensing Roofing. In cases where a metal, slate, or tileroof is used without sheathing, moisture is liable to condense upon theunder side and drip on the floor beneath. This can be prevented… … Fig. 19. Roof Construction in -vrhich Rafters Supporting theSheathing are Laid on the Purlins which Connect the Trusses. 6. Rafters and Purlins. Roof trusses are usually connectedby beams running from one to the other. These beams are calledpurlins. In case the purlins are spaced too far apart to…
Architecture · Building
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